Textural and geochemical characteristics of late Pleistocene to Holocene fine-grained deep-sea sediment cores (GM6 and GM7), recovered from southwestern Gulf of Mexico

Anaya-Gregorio, Abigail; Armstrong-Altrin, John S.; Machain-Castillo, María Luisa; Montiel-García, Patricia C.; Ramos-Vázquez, Mayla A.

doi:10.1186/s42501-018-0005-3

Journal of Palaeogeography

Table 5 Rare earth element concentrations (ppm) for the deep sea sediments of the Southwestern Gulf of Mexico

From: Textural and geochemical characteristics of late Pleistocene to Holocene fine-grained deep-sea sediment cores (GM6 and GM7), recovered from southwestern Gulf of Mexico

Core No.	GM6
Section (cm)	0–1	31–32	46–47	61–62	76–77	91–92	121–122	136–137	151–152	166–167	180–181
La	30.3	28.7	32.9	30.5	29.5	33.4	31.3	32.3	30.7	33.4	29.8
Ce	60.4	59.6	64.8	58.5	57.7	64.3	59.4	60.7	57.6	65	58.8
Pr	7.3	7.15	7.95	7.26	7.11	8	7.45	7.58	6.74	7.93	6.89
Nd	26.1	26.1	28.5	25.5	25.5	28.7	26.9	27.7	25.9	28.4	26.3
Sm	5.31	5.26	5.71	5.25	5.02	5.68	5.14	5.48	5.25	5.52	5.24
Eu	1.03	1.15	1.15	1.03	1.01	1.2	1.04	1.14	1.06	1.14	1.07
Gd	4.49	4.52	4.83	4.79	4.32	4.95	4.65	4.86	4.24	4.88	4.58
Tb	0.717	0.725	0.764	0.745	0.685	0.785	0.736	0.772	0.715	0.758	0.726
Dy	3.96	3.95	4.2	3.9	3.79	4.28	3.77	4.08	3.77	4.12	3.78
Ho	0.821	0.834	0.828	0.813	0.769	0.862	0.808	0.843	0.775	0.822	0.789
Er	2.14	2.12	2.23	2.13	2.02	2.31	2.14	2.23	2.13	2.18	2.18
Tm	0.31	0.311	0.334	0.301	0.305	0.325	0.291	0.33	0.295	0.316	0.308
Yb	2	1.98	2.17	1.95	1.98	2.24	1.96	2.17	1.95	2.16	1.98
Lu	0.303	0.301	0.324	0.302	0.294	0.32	0.291	0.32	0.29	0.324	0.31
LREE	129	127	140	127	125	140	130	134	126	140	127
HREE	14.7	14.7	15.7	14.9	14.2	16.1	14.6	15.6	14.2	15.6	14.7
ΣREE	145	143	157	143	140	157	146	151	141	157	143
Eu/Eu^*	0.93	1.03	0.958	0.898	0.952	0.991	0.934	0.967	0.982	0.968	0.959
Ce/Ce^*	0.885	0.907	0.873	0.855	0.868	0.856	0.848	0.845	0.871	0.87	0.893
Section (cm)	196–197	210–211	222–223	226–227	241–242	256–257	300–301	316–317	330–331	Mean ± 1 s (n = 20)
La	30.8	31.2	30.2	29	31.6	31.8	30.5	33.1	31.8	31.1 ± 1.40
Ce	60.4	59.1	57.3	55.1	60.5	60.1	60.2	65.2	60.5	60.3 ± 2.73
Pr	7.36	7.35	7.05	6.94	7.24	7.49	7.56	7.93	7.38	7.38 ± 0.36
Nd	26.3	26.7	25.4	24.8	26.6	26.8	27.5	28.2	27.5	26.8 ± 1.14
Sm	5.26	5.28	5.01	4.96	5.21	5.35	5.28	5.52	5.26	5.30 ± 0.20
Eu	1.06	1.08	1.06	0.98	0.96	1.13	1.06	1.1	1.04	1.07 ± 0.06
Gd	4.59	4.61	4.5	4.22	4.26	4.92	4.35	4.75	4.38	4.58 ± 0.24
Tb	0.733	0.718	0.705	0.67	0.715	0.75	0.715	0.752	0.735	0.73 ± 0.03
Dy	3.94	3.9	3.82	3.77	3.76	4.11	3.81	4.13	3.79	3.93 ± 0.17
Ho	0.811	0.796	0.782	0.747	0.836	0.828	0.802	0.835	0.815	0.81 ± 0.03
Er	2.12	2.1	2.06	2	2.11	2.14	2.12	2.28	2.09	2.14 ± 0.08
Tm	0.313	0.306	0.3	0.297	0.291	0.315	0.31	0.318	0.309	0.31 ± 0.01
Yb	2.1	2.02	1.99	1.98	2.01	2.15	2.01	2.15	2.03	2.05 ± 0.09
Lu	0.307	0.301	0.299	0.297	0.302	0.31	0.301	0.317	0.303	0.31 ± 0.01
LREE	130	130	125	121	131	132	131	140	132	131 ± 5.61
HREE	14.9	14.8	14.5	14.0	14.3	15.5	14.4	15.5	14.5	14.9 ± 0.60
ΣREE	146	145	140	136	146	148	146	157	148	147 ± 6.16
Eu/Eu^*	0.945	0.962	0.98	0.935	0.892	0.968	0.974	0.942	0.945	0.956 ± 0.031
Ce/Ce^*	0.875	0.85	0.855	0.845	0.869	0.848	0.865	0.877	0.86	0.866 ± 0.017
Core No.	GM7
Section (cm)	0–1	31–32	46–47	61–62	76–77	91–92	121–122	136–137	151–152	166–167	180–181
La	29.2	26.5	33.3	24.6	32.4	29.5	31.2	27.3	30.5	32	23.2
Ce	57.1	53.3	63.3	50.2	63.4	55.3	59	52.3	61.9	62.3	49.8
Pr	6.96	6.28	7.85	5.76	7.72	6.87	7.28	6.43	7.13	7.55	4.72
Nd	25.1	23.9	28.1	20.1	27.5	24.9	26	22.9	25.8	27.1	18.2
Sm	5.02	4.22	5.46	3.98	5.37	4.91	5.06	4.62	5.45	5.29	3.37
Eu	0.983	0.967	1.11	0.88	1.11	0.995	1.05	0.981	1.01	1.07	0.821
Gd	4.26	4.02	4.8	3.68	4.64	4.39	4.57	4.18	4.6	4.65	3.13
Tb	0.686	0.651	0.753	0.59	0.746	0.676	0.712	0.651	0.732	0.725	0.501
Dy	3.83	3.52	3.99	2.84	4.17	3.75	3.84	3.66	3.95	3.9	2.92
Ho	0.76	0.742	0.821	0.54	0.828	0.756	0.778	0.736	0.829	0.796	0.52
Er	2.09	2.01	2.2	1.41	2.22	1.99	2.03	2	2.12	2.11	1.34
Tm	0.302	0.273	0.318	0.193	0.327	0.294	0.307	0.287	0.309	0.309	0.171
Yb	2.06	1.72	2.13	1.26	2.12	1.99	1.98	1.93	2.07	1.99	1.14
Lu	0.295	0.253	0.317	0.184	0.319	0.287	0.291	0.275	0.325	0.299	0.161
LREE	123	114	138	105	136	121	129	114	131	134	99
HREE	14.3	13.2	15.3	10.7	15.4	14.1	14.5	13.7	14.9	14.8	9.9
ΣREE	139	128	154	116	153	137	144	128	147	150	110
Eu/Eu^*	0.933	1.03	0.952	1.01	0.976	0.941	0.963	0.98	0.887	0.944	1.11
Ce/Ce^*	0.872	0.9	0.852	0.92	0.872	0.845	0.853	0.859	0.914	0.874	0.93
Section (cm)	196–197	210–211	222–223	226–227	241–242	256–257	300–301	316–317	330–331	Mean ± 1 s (n = 20)
La	34.3	31.4	29.2	31.7	34.2	30.9	24.9	35.1	28.3	30 ± 3.37
Ce	66.9	60.2	54.9	62.1	65.7	60.5	51.3	67.6	54.1	58.6 ± 5.64
Pr	8.18	6.41	6.93	7.62	7.92	6.94	5.12	8.35	6.81	6.94 ± 0.96
Nd	29.4	26.8	24.6	27.2	28.2	26.5	20.1	30.2	25.1	25.4 ± 3.13
Sm	5.71	4.48	4.91	5.3	5.21	5.14	3.46	5.93	4.25	4.86 ± 0.70
Eu	1.17	1.05	1	1.08	1.08	1.01	0.88	1.24	1.01	1.03 ± 0.10
Gd	4.89	4.17	4.32	4.59	4.82	4.39	3.34	5.13	3.93	4.32 ± 0.51
Tb	0.774	0.68	0.68	0.723	0.77	0.699	0.48	0.803	0.612	0.682 ± 0.085
Dy	4.23	3.78	3.77	4	4.32	3.94	2.39	4.37	3.32	3.72 ± 0.51
Ho	0.854	0.783	0.763	0.823	0.91	0.798	0.49	0.897	0.711	0.757 ± 0.115
Er	2.27	2.09	2.01	2.17	2.34	2.09	1.28	2.33	2.01	2.01 ± 0.305
Tm	0.343	0.289	0.296	0.314	0.351	0.309	0.181	0.339	0.31	0.291 ± 0.051
Yb	2.17	1.98	1.91	2.08	2.24	1.99	1.12	2.26	2.01	1.91 ± 0.34
Lu	0.332	0.271	0.285	0.307	0.361	0.298	0.171	0.346	0.291	0.283 ± 0.054
LREE	144	129	121	134	141	130	105	147	119	126 ± 14
HREE	15.9	14.0	14.0	15.0	16.1	14.5	9.5	16.5	13.2	14 ± 1.93
ΣREE	161	144	136	150	158	146	115	165	133	141 ± 15
Eu/Eu^*	0.97	1.07	0.956	0.966	0.946	0.937	1.14	0.985	1.09	0.989 ± 0.065
Ce/Ce^*	0.869	0.921	0.84	0.87	0.87	0.898	0.986	0.859	0.848	0.878 ± 0.049

Refer to Table 1, for water depth, latitude and longitude. Ce/Ce^* denotes Ce_NASC/[(La_NASC)(Pr_NASC)]^1/2, Eu/Eu^* = Eu_NASC/[(Sm_NASC)(Gd_NASC)]^1/2. NASC = North American shale composite (Gromet et al. 1984). LREE = La + Ce + Pr + Nd + Sm; HREE = Gd + Tb + Dy + Ho + Er + Tm + Yb + Lu

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